In what climatic conditions is frost action most effective? What will be an ideal response?

A group of closely related species:a

kingdom d. genus b. phylum e. family c. order

Ice freezing in the subsurface can push up mounds of gravel with polygonal shapes, creating a surface called _______________. (two words)

Fill in the blank(s) with correct word

European rabbits were introduced into Australia and quickly spread, reproduced, and became a terrible pest. They eat up to $600 million worth of food and pasture crops annually, and have damaged the populations of many native plants and the populations

of animals that eat the plants. Twice in the past 50 years, rabbit diseases have been introduced to try to control the population, with some success. This is a case where ________. A) an extirpation has occurred B) habitat alteration resulted in decreased biodiversity C) climate change has decreased the genetic diversity of indigenous species D) an invasive species has caused overharvesting E) an invasive species has reduced the genetic diversity of indigenous species

The wood thrush makes its nest in woodlands in the northern and eastern United States. As patches of woods become smaller, increasing numbers of wood thrush nests have eggs laid in them by the brown-headed cowbird. Cowbirds live in open fields and are

nest parasites; the female cowbird flies up to an unattended nest, quickly lays an egg in it, and leaves the host parents to raise their "adopted" young. Wood thrushes are decreasing in numbers because ________. A) habitat fragmentation makes it easier for cowbird parasitism to occur B) pollution of the open fields has caused a change in cowbird behavior C) cowbirds are an invasive species that is rapidly increasing D) climate change is reducing nest site availability E) overharvesting in the open fields has driven the cowbirds into the woodlands